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ISA S12.4 : 1970

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

INSTRUMENT PURGING FOR REDUCTION OF HAZARDOUS AREA CLASSIFICATION
Superseded date

01-15-1996

Published date

01-12-2013

Publisher

International Society of Automation

Covers a technique for reducing the hazard classification by the continuous addition of air or an inert gas within a general purpose enclosure. Refers only to hazards created by gases or vapors and is concerned only with those system design criteria related to electrical ignition of a hazardous gas or vapor.

DocumentType
Standard
PublisherName
International Society of Automation
Status
Superseded
SupersededBy

API 500B : 88 ERRATA RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT DRILLING RIGS & PRODUCTION FACILITIES ON LAND & ON MARINE FIXED & MOBILE PLATFORMS
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API 552 : 1994 TRANSMISSION SYSTEMS
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API 540 : 1999 : R2006 ELECTRICAL INSTALLATIONS IN PETROLEUM PROCESSING PLANTS
API 505 : 1997 RECOMMENDED PRACTICE FOR CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS AT PETROLEUM FACILITIES CLASSIFIED AS CLASS I, ZONE 0, ZONE 1, AND ZONE 2
API 540:1999 ELECTRICAL INSTALLATIONS IN PETROLEUM PROCESSING PLANTS

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